Chemistry · Science General

Alcohols, Ethers and Carboxylic Acids

391 Questions

Alcohols, ethers, and carboxylic acids questions explore organic chemistry reactions, chemical formulas, and compound identifications. The topics cover practical applications like antifreeze production and specific chemical conversions. This material helps candidates preparing for science oriented competitive exams.

Organic reactionsChemical compounds identificationAlcohol conversionCarboxylic acid propertiesIndustrial chemical applications

Alcohols, Ethers and Carboxylic Acids Questions

Multiple choice chemistry chemical reactions of organic compounds commercially important alcohols - methanol methanol some commercially important alcohols uses of alcohols

Under suitable condition temperature,pressure and catalyst,methanol can be obtain by:

  1. partial oxidation of hydrocarbons
  2. reacting $H _2$ with $CO$
  3. reacting $H _2$ with $CO _2$

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Partial oxidation of hydrocarbons produces methanol.

$CO + 2H _2O \longrightarrow CH _3OH$
$CO _2 + H _2O \longrightarrow CH _3OH + H _2O$
All the three processes produces mathanol.

Multiple choice chemistry chemical reactions of organic compounds commercially important alcohols - methanol methanol some commercially important alcohols uses of alcohols

An industrial method for the preparation of methanol is:

  1. by catalytic reduction of carbon monoxide

  2. by reacting methane with steam in presence of a catalyst
  3. by reduction of $HCHO$ with $LiAlH _4$
  4. by reduction of $HCHO$ with aqueous $NaOH$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An industrial method for the preparation of methanol is by catalytic reduction of carbon monoxide.
$ \displaystyle \underset {  \displaystyle  \text { Synthetic gas } }{\underset {  \displaystyle  \text { water gas } }{CO+H _2}+H _2} \xrightarrow [ \text { 300 deg C, pressure }]{Cr _2O _3-ZnO} \underset {  \displaystyle  \text { Methanol } }{CH _3-OH}$

Multiple choice zoology microbes in human welfare commercial use of microorganism microbes in household and industry microbial products - food, medicines and industrial products

Smack is chemically?

  1. Diacetyl morphine

  2. Diethyl morphine

  3. Ethyl alcohol
  4. $3-4$ Diacetylmorphine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Smack is one of the street names of heroin which is chemically diacetylmorphine. It is generally produced by the acetylation of crude morphine and is a narcotic analgesic that is used in the treatment of severe pain. Illicit heroin may be smoked or solubilised with a weak acid and then injected.

So, the correct answer is 'Diacetylmorphine'.
Multiple choice

WHAT IS THE CHEMICAL USED IN ARTIFICIAL FRUIT RIPENING

  1. ETHYLENE

  2. BUTANE

  3. METHANE

  4. ACETYLENE
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acetylene (ethyne) is commonly used for artificial fruit ripening. While ethylene is a natural ripening hormone, acetylene is the chemical often used in industrial/commercial ripening processes.

Multiple choice zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

Methanogens converts

  1. Methyl alcohol into methane

  2. Formic acid into methane

  3. Acetic acid into methane

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Methanogens are anaerobic archaea that produce methane as a metabolic byproduct. They are capable of utilizing various substrates, including acetate, formate, and methanol, to generate methane.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

When ethanol mixes in cyclohexane reduces the intermolecular forces between ethanol molecule. In this, liquid pair shows:

  1. ${ \Delta H } _{ mix }>0$
  2. ${ \Delta V } _{ mix }<0$
  3. ${ \Delta G } _{ mix }<0$
  4. ${ \Delta H } _{ mix }=0$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
On adding cyclohexane to ethanol . Its molecules get in between the molecules of ethanol thus breaking the hydrogen bonds and reducing ethanol - ethanol interaction .
Thus will increase the vapour pressure of the solution and result in positive deviation from Rouault's law.
Multiple choice chemistry materials liquid crystals liquid state the liquid state

Which is a more volatile liquid?

  1. $C _{2}H _{5}OH$
  2. $CH _{3}COOH$
  3. $C _{2}H _{5}OC _{2}H _{5}$
  4. $C _{6}H _{6}$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Presence of hydrogen bonding in a liquid decreases its volatile nature. This is because due to hydrogen bonding, there is more association between the molecules and the tendency to go into gaseous phase decreases. Hence, $C _6H _6$ will be more volatile liquid since it has no hydrogen bonding.

Multiple choice chemistry materials we use soap and detergents soap soap and detergent

Soaps are formed by saponification of?

  1. alcohols

  2. glycosides

  3. simple esters

  4. carboxylic acids
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Saponification is formation of soaps from triglycerides (esters) when reacted with sodium hydroxide to give sodium salts of fatty acids.

$\underbrace {C _2H _5COOCH _3} _{Esters}+NaOH\longrightarrow C _2H _5CO\overset {\circleddash}{O}Na+C _2H _3OH$

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Among ethanol, dimethyl ether, methanol and propanal, the isomers are

  1. ethanol, dimethyl ether, methanol and propanal

  2. ethanol and methanol

  3. ethanol, dimethyl ether, and methanol

  4. ethanol and dimethyl ether
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ethanol $(C _2H _5OH)$ and dimethyl ether $(CH _3-O-CH _3)$ have same molecular formula but different functional groups, so they are isomers.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

The miscibility of ether with _______ resembles those of alcohol of the same molecular mass.

  1. methanol

  2. water

  3. DCM

  4. benzene
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The miscibility of ether with water resembles those of alcohol of the same moleculer mass. It is generally due to the hydrogen bonding with water in alcohol. So the correct option is $B$.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Diethyl ether and methyl propyl ether are ___________ of each other.

  1. mesomers

  2. functional isomers

  3. none of these
  4. both $A$ and $B$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Diethyl ether $ \displaystyle CH _3-CH _2-O-CH _2-CH _3$ and Methyl propyl ether $ \displaystyle CH _3-O-CH _2-CH _2-CH _3$ are metamers of each other. They have same molecular formula but different alkyl groups attached on either side of the oxygen atom.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Alcohols and ethers are functional isomers and belong to:

  1. same homologous series

  2. same functional group

  3. different homologous series

  4. both B and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Alcohols and ethers are functional isomers because they have some molecular formula but different structure but they belong to different homologous series. 
$R-CH _2-CH _2-OH$         $R-CH _2O-CH _3$
     alcohol                                              ether